Presenting officer Cadi Dewi told it was after he noticed a love bite on her neck that he discovered she was in a relationship with her teacher.

Ms Dewi said: "Concerns first came to light about the relationship when the girl's father made a referral to her college. He noticed she had marks on the side of her neck which he described as love bites.

"He was then told by her sister that the girl was 'seeing' Davies."

The father, who works in Dyfed Powys Police in West Wales, alerted his colleagues to suspected affair and an investigation was launched at Carmarthenshire College.

We've had a conversation about my sexuality before, and I think there's a lot of confusion to be honest. Nia was just a supportive lecturerThe teenager

The girl admitted to police she had spent weekends away in Bath and London with her teacher - and they had shared the same hotel bed.

She denied having sex with Davies, but said they had kissed and would sleep together at Davies' home in Cardiff. The police investigation led to Davies being arrested and bailed.

But the hearing was told she was never charged. Her college in Llanelli, West Wales, launched their own investigation which led to Davies' dismissal in August last year.

Ms Dewi told the hearing: "Davies' conduct amounts to inappropriate misconduct, when you take into account her role as an educator and the girl's role as a learner."

The girl, now 19, was described as a "outgoing and bright pupil" - and was identified on as "Learner A" when she gave evidence. She told the hearing she had never been in a sexual relationship with Davies.

The teenager denied she had previously admitted to police, her father and mother that she had kissed her teacher - saying they must have been "confused."

She said: "We sent texts but they were social texts. They were only in the tens, not the thousands.

"I never admitted kissing Nia to my father, it's completely untrue. That conversation never happened and I can't explain it.

"We've had a conversation about my sexuality before, and I think there's a lot of confusion to be honest. Nia was just a supportive lecturer."

Ms Dewi asked her if she could explain why a hotel manager in London identified her as a girl who had stayed with Davies overnight, to which she replied: "It couldn't have been me because I wasn't there."

She also denied she was now living with Davies in Cardiff. Her father told the hearing he confronted his daughter about the relationship which she at first denied before admitting they had kissed.

He said: "She was adamant she wasn't attracted to females at first. She said they weren't in a relationship.

"But then she admitted kissing her and said she'd stayed over at her house."

George Pollitt, representing Davies, said the allegations were a "mess of confusion" and she strenuously denied the affair.

He added: "These include allegations of a trip to London to see art museums. Any pupil would would take heart from a teacher showing such interest in their education."

Davies faces eight claims including that she was "engaging in email communication of a social rather than academic nature," "saw Learner A unaccompanied on a social basis", "shared a bed with Learner A during a trip to London" and "invited Learner A into her home on at least one occasion."

Miss Davies is also alleged to have "allowed Learner A to sleep at her home", "kissed Learner A", "gave Learner A a love bite" and "engaged in sexual intercourse with Learner A".